Like I say, all the gay/bi people I know just don't say "that's gay." Cause to us (speaking solely for myself and the people I know with whom I've talked about it) "gay" means "homosexual" because we think about it in those terms more often. So when we say "that's gay" we mean, "that has tendencies of a homosexual" and nothing more. When other people say it, they presumably mean "that's stupid." Well, whatever, I mean, I can't stop you from saying it but I'm not entirely cool with it either, because that implies that gay means the same as stupid. Maybe I will start saying, "That's straight" to mean "that's stupid." And you can't get offended by me saying it because I can't get offended that you say "that's gay."